Home Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

RE: 6AF4A Useful?

I don't know. As gm increases, I increase the stopper value. My seat of the pants value for the low gm 'X7 triode is 100 ohms. OTOH, the high gm 5842 has 4 grid connections and I advocate 4X 10 Kohm parts arranged in a "cone" on that tube.

A tiny ferrite bead cemented around, but not touching, the grid's socket lug(s) is another anti-parasitic oscillation method. I like that idea on the "upper" triode of a cascode, as that grid should be at AC ground.

Eli D.


This post is made possible by the generous support of people like you and our sponsors:
  Kimber Kable  


Follow Ups Full Thread
Follow Ups
  • RE: 6AF4A Useful? - Eli Duttman 11:59:36 05/18/17 (0)

FAQ

Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.